Yes we have seen many baby teeth he has spit out. It does seem it would be related to teething.
We did talk tot he breeder and she said it may be due to getting male hormones. (Which Diesel is probably also doing since he has started to pee with his leg up day before yesterday.) The breeder also suggested posting a thread to a basenji forum and see what others have experienced.
Before I owned Mica, I owned two Alaskan Malamutes and managed to find three of their baby teeth, total, and subsequently had a necklace made of them.
BaMica
I have seen Mica when she goes on point with her tail straight out and her front and back paws CAREFULLY matching each step chatter her jaw - It kind of goes open and shut and wanders open and shut that way. She is like an arrow waiting to fly out of the bow onto the suspected target. She never stops that behavior, either. Than she makes a mad dash for the squirrel or critter and will do doggie-ups on the side of a tree - maybe 6-8 feet up the side than down. Than shell do it again just because she has to try again. I think she is getting some really strong chest muscles. I think it might me intense excitement and anticipation.
Micas mom